LD8088 查看數據表（PDF） - Intel

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LD8088

8-BIT HMOS MICROPROCESSOR

Intel 

8088

8086 8088 Instruction Set Summary (Continued)

Mnemonic and

Description

PROCESSOR CONTROL

76543210

Instruction Code

76543210

CLC e Clear Carry

11111000

CMC e Complement Carry

11110101

STC e Set Carry

11111001

CLD e Clear Direction

11111100

STD e Set Direction

11111101

CLI e Clear Interrupt

11111010

STI e Set Interrupt

11111011

HLT e Halt

11110100

WAIT e Wait

10011011

ESC e Escape (to External Device)

11011xxx

mod x x x r m

LOCK e Bus Lock Prefix

11110000

NOTES

AL e 8-bit accumulator

AX e 16-bit accumulator

CX e Count register

DS e Data segment

ES e Extra segment

Above below refers to unsigned value

Greater e more positive

Less e less positive (more negative) signed values

if d e 1 then ‘‘to’’ reg if d e 0 then ‘‘from’’ reg

if w e 1 then word instruction if w e 0 then byte

instruction

if mod e 11 then r m is treated as a REG field

if mod e 00 then DISP e 0 disp-low and disp-high are

absent

if mod e 01 then DISP e disp-low sign-extended to

16 bits disp-high is absent

if mod e 10 then DISP e disp-high disp-low

if r m e 000 then EA e (BX) a (SI) a DISP

if r m e 001 then EA e (BX) a (DI) a DISP

if r m e 010 then EA e (BP) a (SI) a DISP

if r m e 011 then EA e (BP) a (DI) a DISP

if r m e 100 then EA e (SI) a DISP

if r m e 101 then EA e (DI) a DISP

if r m e 110 then EA e (BP) a DISP

if r m e 111 then EA e (BX) a DISP

DISP follows 2nd byte of instruction (before data if re-

quired)

except if mod e 00 and r m e then EA e disp-high

disp-low

if s w e 01 then 16 bits of immediate data form the oper-

and

if s w e 11 then an immediate data byte is sign extended

to form the 16-bit operand

if v e 0 then ‘‘count’’ e 1 if v e 1 then ‘‘count’’ in (CL)

register

x e don’t care

z is used for string primitives for comparison with ZF FLAG

SEGMENT OVERRIDE PREFIX

0 0 1 reg 1 1 0

REG is assigned according to the following table

16-Bit (w e 1) 8-Bit (w e 0) Segment

000 AX

001 CX

010 DX

011 BX

100 SP

101 BP

110 SI

111 DI

000 AL

001 CL

010 DL

011 BL

100 AH

101 CH

110 DH

111 BH

00 ES

01 CS

10 SS

11 DS

Instructions which reference the flag register file as a 16-bit

object use the symbol FLAGS to represent the file

FLAGS e

X X X X (OF) (DF) (IF) (TF) (SF) (ZF) X (AF) X (PF) X (CF)

Mnemonics Intel 1978

DATA SHEET REVISION REVIEW

The following list represents key differences be-

tween this and the -005 data sheet Please review

this summary carefully

1 The Intel 8088 implementation technology

(HMOS) has been changed to (HMOS-II)

30

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